-4x(x+1)+7x=8

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Solution for -4x(x+1)+7x=8 equation:


Simplifying
-4x(x + 1) + 7x = 8

Reorder the terms:
-4x(1 + x) + 7x = 8
(1 * -4x + x * -4x) + 7x = 8
(-4x + -4x2) + 7x = 8

Reorder the terms:
-4x + 7x + -4x2 = 8

Combine like terms: -4x + 7x = 3x
3x + -4x2 = 8

Solving
3x + -4x2 = 8

Solving for variable 'x'.

Reorder the terms:
-8 + 3x + -4x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-8 + 3x + -4x2 = 0

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
2 + -0.75x + x2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -0.75x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + -0.75x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -0.75x + x2 = 0 + -2
-0.75x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
-0.75x + x2 = -2

The x term is -0.75x.  Take half its coefficient (-0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
-0.75x + 0.140625 + x2 = -2 + 0.140625

Reorder the terms:
0.140625 + -0.75x + x2 = -2 + 0.140625

Combine like terms: -2 + 0.140625 = -1.859375
0.140625 + -0.75x + x2 = -1.859375

Factor a perfect square on the left side:
(x + -0.375)(x + -0.375) = -1.859375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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